Fix OOM in TextureUpload perf test
Fix OOM in TextureUpload perf test

The test texture size is reduced from 2k x 2k to 1k x 1k to avoid OOM on
lower-memory devices.

Bug: 945415
Change-Id: I66611417114212427f0a2cfc677450f5e705a7ca
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1537331
Commit-Queue: Shahbaz Youssefi <582eeec4f08a2ccd61e3ef52115e6e7c571582de@chromium.org>
Reviewed-by: Yuly Novikov <36f5580f63d0a3eacc17e89a61d11e2f646630d2@chromium.org>

ppy/angle,ppy/angle,ppy/angle,ppy/angle